JPH02264100A - Production of matte coated paper - Google Patents

Abstract

PURPOSE:To obtain the subject coated paper having low white-paper luster, elegant appearance and excellent printability, exhibiting low ink luster and free from generation of printing mottle by coating a specific base paper with an aqueous coating composition composed mainly of a pigment and an adhesive, drying the composition and finishing with a calender. CONSTITUTION:The objective coated paper can be produced by applying an aqueous coating composition composed mainly of a pigment and an adhesive to a base paper having a dynamic wet value of -0.32 to +0.20g (preferably -0.25 to +0.10g) and containing 50-100 pts.wt. of calcium carbonate (preferably ground calcium carbonate) having an average particle diameter of 2-15mum and 0.1-5.0 pts.wt. of satin white as pigments, drying the coating composition and finishing with a calender.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention is a matte coated paper, especially one that exhibits low white paper gloss and low ink gloss, is elegant and does not generate printing mottle, and has excellent printability. The present invention relates to a method for producing matte coated paper.

``Prior art'' Matte coated paper has a more sophisticated and deep tone compared to high-gloss general coated paper for printing, so it has a strong image of being a high-class product (for example, it is used in various books, magazines, etc.) It is widely used for everything from covers, high-end posters, catalogs, etc. to body paper, and is one of the coated papers with high general-purpose value.

Conventionally, there are two types of matte coated paper: one is called a mantle-gloss type, which is a matte coated paper with low white paper gloss but high ink gloss, and the other is matte coated paper. - Called matte type, it is a matte coated paper with low white gloss and ink gloss.

That is, in the former manufacturing method of cloak-gloss type coated paper, it is necessary to suppress the absorption of printing ink and produce ink gloss, so it is necessary to create a dense coating layer surface, and pigments that tend to produce ink gloss, such as pigments, are required to produce ink gloss. A coating composition using a relatively fine pigment having an average particle diameter of about 0.5 to 1.5 μm is applied, and the surface of the coating layer is roughened as described in Japanese Patent Publication No. 59-53956. It is a matte coated paper with low white gloss and high ink gloss that is finished with a matte finish using a calender with surfaced metal rolls, and the white paper gloss (JIS P8142 method) is also 25.
It is relatively high at ~40%. Also, the latter mat-
The method for producing matte coated paper uses pigments for coated paper used in the production of ordinary printing coated paper, which have an average particle size of 1 to 2.
A coating liquid whose main component is a relatively coarse pigment on the order of micrometers is coated on base paper, dried, and then finished as is without smoothing with a calender, etc., or it can be finished with a very light calender treatment. The white paper gloss level is 5~
It is a matte coated paper with a low white paper gloss of 30% - low ink gloss. Generally, such matte coated paper has extremely poor smoothness and printability.

Therefore, in order to obtain good smoothness, surface pressure treatment with a calender or the like is still necessary, but if a coating composition containing a high proportion of fine particle size, such as kaolin, is used, On the other hand, if a pigment with irregular particle shape, such as calcium carbonate, is used as the main pigment, the white paper gloss can be suppressed to a lower level, but the surface of the coating layer Because the microporosity (micropores) of the paper is reduced by calendering, the ink becomes glossy, resulting in Mazdo gloss-type coated paper.Especially in the solid areas of multicolor printing by offset printing, the ink gloss becomes This results in mottling and a very ugly print finish. Incidentally, even when the coating composition is scraped off with a blade after coating to perform measurement and smoothing, the coating layer is densified, resulting in the development of ink gloss. Due to the above-mentioned circumstances, it is currently not possible to obtain a matte-matte type coated paper having good smoothness.

``Problem to be Solved by the Invention'' The method of the present invention provides a method for obtaining a matte-matte coated paper having high smoothness and excellent printability without printing mottle.

"Means for Solving the Problems" The present invention provides a method for producing matte coated paper in which a water-based coating composition containing pigments and adhesives as main components is coated on a base paper, dried, and then calendered. The dynamic wetting value of the base paper is -0,
32~O,'20g, and the average particle size is 2 as a pigment.
This is a method for producing a matte coated paper characterized by containing 50 to 100 parts by weight of calcium carbonate with a diameter of ~15 μm and 0.1 to 5.0 parts by weight of Sachin White.

"Function" The present inventors have discovered that in the method of obtaining a matte-matte type matte coated paper as described above, when the coating layer is smoothed, the ink gloss increases, and printing ink mottle develops thereon. In addition, as a result of intensive study and research into the contradictory problem that taking measures to lower the ink gloss would have to reduce the smoothness, we found that as the main pigment, coarse particle calcium carbonate with an average particle diameter of 2 to 15 μm, Water-based coating containing a specific amount of Sachin White as an auxiliary pigment.

By coating the composition on a base paper having a specific dynamic wetting value, a matte-matte coated paper of the matte-mat type type, which does not generate printing ink mottle and has excellent printability, can be obtained. This discovery led to the completion of the present invention.

First, the characteristics of the base paper in the method of the present invention, that is, the dynamic wetting value will be described.

The dynamic wetting value of the base paper is specified as -0.32 to 0.20 g, but if the wetting value is less than -0.32 g, the penetration of the coating liquid into the base paper is extremely slow. , the immobilization time of the coating liquid becomes longer, migration of the binder is more likely to occur, and the uniform distribution of the binder is impaired, so that printing ink mottles are more likely to occur after printing.

On the other hand, if it exceeds 0.20 g, the coating liquid penetrates into the base paper quickly, and when the coating liquid of the present invention is coated on the base paper, the main pigment is heavy calcium carbonate with an average particle size of 2 to 15 μm. Coating compositions with poor water retention properties are accelerated to penetrate into the base paper, and as a result, less of the coating composition remains on the base paper surface, and the base paper surface is not sufficiently covered. It is not possible to obtain the desired surface smoothness.

Here, the dynamic wettability value is the dynamic wettability tester (NET-3
This is a value obtained by measuring the wettability (adhesive force) of the base paper with water over time using a 3D paper (manufactured by Resca 000/II). Specifically, using the above tester, test a 2 x 5 cm + test piece for 16 mm.
This method measures the degree of wetting over time (adhesion force) when immersed in water at a depth of 12 m for 10 seconds at a speed of 10 seconds. As a result, it was found that the wettability value 2 seconds after the start of the test had an extremely large correlation with the ink motility and smoothness. Therefore, in the present invention, the measured value after 2 seconds is defined as the dynamic wetting value. The smaller the dynamic wetting value, the worse the water wetting, and the larger the value, the better the water wetting.

The dynamic wetting value of base paper can be adjusted by adjusting the pulp composition, beating conditions, type and amount of filler, paper strength agent, internal sizing agent, and pH.
, surface sizing agent, surface treatment agent, drying conditions, etc., are determined by appropriately adjusting them depending on the individual paper machine and paper making conditions, and cannot be generally specified. Furthermore, the clear correlation observed between the dynamic wetting value of the base paper and the printing ink mottle determined by the method of the present invention is similar to the Cobb water absorbency, which is applied in the Gio test, etc., as the conventional water absorbency aptitude. No correlation was found between the values of human size, etc.

Incidentally, when the dynamic wetting value of the base paper exceeds 0.20 g (when the wetting value of the base paper is large), the aqueous composition penetrates into the base paper quickly, and the coating liquid of the present invention was coated on the base paper. In this case, since the coating composition has poor water retention properties and contains heavy calcium carbonate as the main pigment with an average particle size of 2 to 15 μm, the aqueous composition synergistically penetrates into the base paper faster and The amount of aqueous coating composition that accumulates in the paper decreases, and as a result, the surface of the base paper is not sufficiently coated, making it impossible to obtain the desired surface smoothness.

On the other hand, when the dynamic wetting value is less than -0.32 g (insufficient wetting), the penetration of the aqueous coating composition into the base paper becomes very slow, the immobilization time of the coating liquid becomes long, and the binder Migration silane is more likely to occur, impairing the uniform binder distribution and resulting in printing ink mottles after printing.

Next, the pigment characteristics of the coating composition will be described.

That is, pigments used as main pigments in coating compositions for general printing coated paper include, for example, kaolin, talc, aluminum hydroxide, etc., but when these tabular pigments are used, their average particle diameter Even if the thickness is 2 to 15 μm, these pigments are oriented parallel to the surface of the coated layer, resulting in a dense coated layer and slower ink absorption, resulting in ink gloss. . Therefore, in the method of the present invention, it is particularly preferable to use coarse-grained heavy calcium carbonate as the main pigment, which has an amorphous particle shape and which, in principle, does not become parallelly oriented during the coating process or calendering process. Further, even by using light calcium carbonate having a large specific surface area and made into coarse particles by secondary aggregation, it is possible to obtain matte coated paper with good surface smoothness while maintaining low ink gloss.

The calcium carbonate used as the main component of the coating composition in the present invention is characterized in that it has a relatively coarse particle size, and specifically, the average particle size is 2 to 15 μm.
, more preferably 3 to 10 μm.

Incidentally, if the thickness is less than 2 μm, the ink gloss will become too high;
If it exceeds 5 μm, the micro-smoothness of the surface of the coating layer will decrease, resulting in poor printability, and both are unsuitable. Note that the amount of the above-mentioned specific calcium carbonate in the total pigment is preferably 50 to 100 parts by weight, and if it is less than 50 parts by weight, it becomes difficult to obtain the desired Φ effect. In addition, in the - method, since calcium carbonate with a coarse particle size is used as the main pigment, the solidification point of the coating liquid (see Paper and Paper Technical Association Vol. 39, No. 7, p. 621) becomes high, and as a result, in the drying process. Adhesive migration caused silane migration, and printing ink motility could not be improved.

Therefore, the present inventors have found that lowering the solidification point of the coating composition is an extremely important requirement as a method for improving the above-mentioned ink motility, and have carried out various studies.
As a result of repeated research, it has been found that the solidification point of the coating composition can be extremely effectively lowered by adding a small amount of Sachin White as an auxiliary pigment to the coating composition. That is,
Favorable results were obtained when Sachin White was applied in an amount of 0.1 to 5.0 parts by weight, more preferably 0.5 to 3.0 parts by weight, to the total pigment.

Although the reason is not necessarily clear, the use of a small amount of Sachin White has the effect of significantly reducing the increase in the solidification point of the coating liquid, which is seen when calcium carbonate with a coarse particle size is used in the present invention. The goal is to demonstrate effectiveness. Incidentally, if it is less than 0.1 parts by weight, no effect of lowering the solidification point is observed, and if it exceeds 5.0 parts by weight, the white paper gloss and ink gloss of the coated paper will increase, resulting in the desired matte-matte type. However, the average particle diameter of Sachin White used in the present invention is 1°2 μm.
The following are preferred. If it exceeds 1.2 μm, it is undesirable because structite, scratches, streaks, etc. are likely to occur when the coating composition is applied with a blade.

Moreover, the average particle diameter of Sachin White is a value determined by the following measurement method.

That is, 5% by weight of sodium polyacrylate was added to Sachin White (solid content) as a dispersant to prepare a dispersion of Sachin White with a solid content concentration of 2 to 3% by weight.
Dispersion was carried out at ~35°C for 5 minutes using an ultrasonic disperser, and the particle size and weight distribution was measured using the gravity sedimentation method (measuring device/Sedaygraph 5000-01: manufactured by Shimadzu Corporation). The equivalent sphere diameter was taken as the average particle diameter of Sachin White (specific gravity: 1.77). Although the crystal form of Sachin White is needle-like or rod-like, in order to obtain the desired effects of the present invention, the most effective method for growth was to use this average particle diameter measurement method.

The coating composition prepared by the method of the present invention contains, in addition to calcium carbonate, kaolin, clay, which is commonly used as a pigment for coating paper, in order to improve the micro-smoothness of the coating layer. Pigments such as titanium oxide, talc, and calcined clay are used as appropriate within the range that does not impair the purpose of the present invention (less than 50% by weight based on the total pigment). However, these pigments usually have an average particle size of Since many of them have a diameter of 2μ or less, it is necessary to adjust the thickness to such an extent that the effects of the present invention are not impaired.

As mentioned above, various types of pigments are used in the present invention, but since the specific gravity differs depending on the type of pigment, it is difficult to directly measure the average particle diameter of the mixed pigment. ■Particle size distribution analyzer (SA
-CF2), the individual average particle size of each pigment used was measured in advance, and the average particle size of all pigments was calculated according to the pigment formulation at that time.

Examples of adhesives used in the coating composition include proteins such as casein, soybean protein, and synthetic proteins, and conjugated diene polymers such as styrene-butadiene copolymers and methyl methacrylate-butadiene copolymers. Acrylic polymer latex such as latex, polymer or copolymer of acrylic acid ester and/or methacrylic acid ester, vinyl polymer latex such as ethylene/vinyl acetate copolymer,
Or alkali-soluble or alkali-insoluble polymer latexes obtained by modifying these various polymer latexes with monomers containing functional groups such as carboxyl groups; synthetic resin systems such as polyvinyl alcohol, olefin/maleic anhydride resins, and melamine resins. Starches such as adhesive-positive starch and oxidized starch;
One or more types of common adhesives for coated paper such as cellulose derivatives such as carboxymethyl cellulose and hydroxyethyl cellulose are appropriately selected and used. The adhesive is generally blended in an amount of 5 to 30% by weight, more preferably 10 to 20% by weight, based on 100% of the pigment.

In addition, antifoaming agents, coloring agents,
Various auxiliary agents such as mold release agents and flow modifiers are appropriately blended, but
As an auxiliary agent to promote solidification of the coating layer, for example, amine, amide, polyacrylamide, etc., or polyvalent metal salts such as zinc, aluminum, magnesium, calcium, barium, etc. are used in an amount of about 0.1 to 10% by weight based on 100 parts of the pigment. It is also possible to add.

The aqueous coating composition thus obtained can be coated using a generally known coating method such as a blade coater, air knife coater, roll coater, reverse roll coater, curtain coater, die loft coater, gravure coater, etc.
The base paper is coated in one layer or in multiple layers using an on-machine or off-machine coater equipped with a coating device such as a chambrax coater or a size press coater. In particular, in the case of the present invention, the uppermost coating layer is It is important that it is formed by a blade coater.

When the coating composition of the present invention is coated with a vent type or bevel type blade coater, it has better properties than when coated with a coater such as an air knife coater, roll coater, or rod coater. A smooth coating layer surface can be obtained. However, when performing blade coating in this manner, it is important to keep the average particle size of Sachin White blended in the coating liquid to 1.2 μm or less, as described above.

Furthermore, the present inventors also investigated the drying process after coating the base paper with the coating composition liquid, and as a result, it was found that the drying conditions are also greatly involved in the trend of binder migration. In particular, when coarse-particle calcium carbonate is used as the main pigment as in the method of the present invention, after coating the base paper with the coating liquid, conventional methods such as steam heating, gas heater heating, hot air heating, and drum heating are applied. When drying by such methods, only the surface portion of the coating layer dries first, and uniform drying over the entire coating layer (particularly drying in the Z-axis direction) is not achieved, resulting in uneven drying and binder migration. It was found that the occurrence of mottle in printing ink tends to be promoted.

Based on this knowledge, we conducted extensive research on drying, and found that using near-infrared rays as a means of drying a wet coating layer results in uniform drying of the coating layer as a whole (along the Z-axis direction). It has been found that this is an extremely effective means for obtaining the desired effect.

Infrared drying is one of the conventional (known drying methods), but the wavelength of infrared rays usually ranges from 0°75 to 2.5°.
Near-infrared region of μm, mid-infrared region of 2.5-25 μm, 25
It is broadly classified into infrared rays in the far infrared range of ~2000 μm (Instrumental Analysis Guide Ichi Kagaku Dojin/April 2, 1979)
(Refer to the issue published on 0th) Generally, mid-infrared rays and far infrared rays with a wavelength of 2.5 μm or more are exclusively used.
The near-infrared drying used in the method of the present invention is a relatively new drying method.

That is, in the method of the present invention, infrared rays in the near-infrared region are selectively used, and the wavelength is 0.75 to 2.5 μm.
More preferably, near-infrared rays of 1.0 to 2.0 μm are used. Incidentally, if the wavelength is less than 0.75 μm, the effect on water evaporation for drying and solidifying the coating layer will be extremely small, and if the wavelength exceeds 2.5 μm,
Although this method is effective for ordinary water evaporation and drying, the desired effect of the present invention cannot be obtained.

As described above, it is not necessarily clear that near-infrared drying is effective in preventing the occurrence of mottle in printing ink, but near-infrared rays have a strong penetrating power through coating layers and a high energy density, so the present invention When drying a wet coating composition containing a specific satin white on a specified base paper,
This is thought to be due to the fact that the coating layer solidifies and dries instantly and uniformly, effectively suppressing migration of the binder. For this reason, it is presumed that the desired matte coated paper, which does not cause printing ink mottle, can be obtained because the uniform distribution of the binder in the coating layer is not impaired.

As mentioned above, when a coating composition consisting of a specific pigment formulation is coated and dried on a base paper having a specific dynamic wettability value, ink mottle can be eliminated extremely effectively due to the synergistic effect of the two. It is also possible to obtain matte coated paper with excellent smoothness.

In addition, the base paper used in the present invention has a weight of 3.
A material having a weight of about 0 to 400 g/rl is used as appropriate depending on the purpose.

In addition, the amount of coating on the base paper is usually 3 to 3 per side on a dry weight basis.
It is about 50 g/rd, but considering the blank paper quality and printability of the coated paper obtained, it is desirable to adjust it within the range of about 8 to 30 g/rd, and the moisture content of the coated paper after drying is It is usually adjusted within the range of 3 to 10%.

The dried coated paper obtained in this way is pressure-finished using an on or off super calender, a cloak calender, a roughening roll calender, a soft calender, etc., but the method of the present invention provides a white paper gloss (JIS P) finish. 8142
Light pressure finishing is carried out so that the amount (based on measurements according to the law) is 25% or less, more preferably 20% or less. In this case, in order to obtain the balanced white paper gloss and smoothness desired by the present invention, the density of the matte coated paper should be in the range of about 1.00 to 1.18 g/m". is desirable.

The matte coated paper of the present invention obtained using the above-mentioned specific base paper, paint, coating method and drying method has low white paper gloss and printing ink gloss, and has improved surface smoothness and printing mottle after printing. A matte-matte type coated paper is provided.

"Example" The present invention will be described in more detail with reference to Examples below, but it is of course not limited to these.

Note that unless otherwise specified, "parts" and "%" in the examples indicate "parts by weight" and "% by weight," respectively.

Example 1 99 parts of heavy calcium carbonate with an average particle size of 8 μm, 1 part of Sachin White with an average particle size of 0.8 μm, and 0.2 parts of sodium polyacrylate as a dispersant were added to water using a Coles disperser. A pigment slurry having a solid content concentration of 70% was prepared by dispersing the pigment. Add 7 parts of oxidized starch (solid content) to this pigment slurry.
was added, and water was further added to prepare a coating liquid with a solid content concentration of 60%.

This aqueous coating liquid was coated on both sides with a blade coater so that the dry weight was 25 g/td per side on base paper of 74 g/nr, which was made to have a dynamic wetting value of -0.20 g. After coating and drying in a hot air dryer, super calendering was carried out so that the density of the coated paper was 1.05 g/cm 3 to obtain a matte coated paper. The quality evaluation shown below was performed on the obtained matte coated paper, and the results are shown in Table-1.

[Quality evaluation items and evaluation methods] Average particle diameter of all pigments: The average particle diameter (μ-) of each pigment was measured using a particle size distribution analyzer 5A-CF2 (manufactured by Shimadzu Corporation) and determined by calculation.

White paper gloss i Measured at an angle of 75° according to JIS P 8142.

White paper smoothness: Measured using a Smoother smoothness meter (manufactured by Toei Denshi Co., Ltd.).

The smaller the value, the better the smoothness.

Printing Mottle: Printing was performed using an RI printing machine (manufactured by Mei Seisakusho), and the state of printing unevenness of the indigo ink was evaluated by visual judgment.

〔Evaluation criteria〕

Very good Good Very poor Example 2 In Example 1, instead of 99 parts of heavy calcium carbonate, 50 parts of heavy calcium carbonate with an average particle size of 14μ and 49 parts of light calcium carbonate with an average particle size of 4μ were used. A matte coated paper was obtained in the same manner except that the following was used. The quality of the obtained matte coated paper was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

Example 3 A matte coated paper was obtained in the same manner as in Example 1, except that 99 parts of heavy calcium carbonate having an average particle size of 3 μm was used instead of 99 parts of heavy calcium carbonate. The quality of the obtained matte coated paper was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

Example 4 A matte coated paper was prepared in the same manner as in Example 1, except that 96 parts of heavy calcium carbonate with an average particle size of 8μ and 4 parts of Sachin White with an average particle size of 0.8μ were used as pigments. I got it. The quality of the obtained matte coated paper was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

Examples 5 to 6 Matt coated papers were obtained in the same manner as in Example 1, except that base papers having dynamic wetting values of -0, 25, 0, and 15 g, respectively, were used. The quality of the obtained matte coated paper was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

Example 7 A coating liquid was prepared using 89 parts of heavy calcium carbonate with an average particle size of 14μ as pigments, 10 parts of kaolin, and 1 part of Sachin White with an average particle size of 0.8μ. A matte coated paper was obtained in the same manner as in Example 1, except that the same base paper as in Example 1 was coated with near-infrared rays at a wavelength of 1.2 μm and further dried in a hot air dryer. The quality of the obtained matte coated paper was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

Examples 8 to 10 As a drying method, a method similar to Example 7 was used, but in this case, the wavelength of infrared rays in infrared irradiation was changed to 1
．． 2.1.7. A matte coated paper was obtained in the same manner as in Example 1, except that the volume was changed to 0.7 μl. The quality of the obtained matte coated paper was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

Comparative Examples 1 to 2 In Example 1, instead of heavy calcium carbonate having an average particle diameter of 8μ as a pigment, each pigment had an average particle diameter of 1μ.
．． A matte coated paper was obtained in the same manner as in Example 1, except that 0.17.0 μm of ground calcium carbonate was used. The quality of the obtained matte coated paper was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

Comparative Example 3 In Example 1, 30 parts of ground calcium carbonate with an average particle size of 8 μ- and 69 parts of kaolin were used instead of 99 parts of heavy calcium carbonate with an average particle size of 8 μ-, which is the pigment for coating composition. A matte coated paper was obtained in the same manner as in Example 1 except that . Example 1 for the obtained matte coated paper
Quality evaluation was conducted in the same manner as above, and the results are shown in Table 1.

Comparative Example 4 Matting was produced in the same manner as in Example 1, except that 94 parts of heavy calcium carbonate with an average particle diameter of 8 μ- and 6 parts of Sachin White with an average particle diameter of 3 μ- were used as pigments. A coated paper was obtained. The quality of the obtained matte coated paper was evaluated in the same manner as in Example 1, and the results are shown in Table 1. However, in this case, structite and scratches were observed during blade coating, making the blade coating unsuitable.

Comparative Example 5 Heavy calcium carbonate 9 with an average particle diameter of 8μ as a pigment
A matte coated paper was obtained in the same manner as in Example 1, except that 9.95 parts and 0.05 parts of Sachin White having an average particle size of 0.8 μm were used. The quality of the obtained matte coated paper was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

Comparative Examples 6-7 Matte coated papers were obtained in the same manner as in Example 1, except that base papers having dynamic wetting values of -0, 34, 0, and 22 g were used, respectively. The quality of the obtained matte coated paper was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

The light source of the infrared irradiation device used in Examples 7 to 10 is composed of a filament, a light condensing plate, and an opposing reflector, and the filament is made of tungsten.
Near-infrared radiation was obtained by electrical heating from 00 to 3800-K. The near-infrared rays thus obtained were collected by a gold-coated light collecting plate (placed above the filament) and radiated onto the paper. In addition, the near-infrared rays that have passed through the paper are reflected by an aluminum plate placed on the back side of the paper and re-radiated onto the paper, which is designed to dry the coated layer more evenly. .

"Effects" As is clear from the results in Table 1, the coated paper obtained in the examples of the present invention has the desired gloss and smoothness, and has an excellent matte finish that does not cause printing mottle. It was a matte coated paper.

Claims (6)

[Claims] (1) A method for producing matte coated paper in which an aqueous coating composition containing pigments and adhesives as main components is coated on a base paper, dried, and then calendered, in which the dynamic wetting value of the base paper is -0. 32
~0.20g, and the average particle size as a pigment is 2~15
A method for producing matte coated paper, characterized in that it contains 50 to 100 parts by weight of μm calcium carbonate and 0.1 to 5.0 parts by weight of Sachin White. (2) The method for producing a matte coated paper according to claim (1), wherein the base paper has a dynamic wettability value of -0.25 to 0.10 g. (3) The method for producing matte coated paper according to claim (1), wherein the calcium carbonate is heavy calcium carbonate. (4) The method for producing matte coated paper according to claim 1, wherein the glossiness of the matte coated paper is 25% or less as measured in accordance with JISP8142 method. (5) The matte according to claim (1), wherein the aqueous coating composition containing Sachin White having an average particle diameter of 1.2 μm or less is applied with a blade, and the smoothness after calendering is 60 cmHg or less. Method of manufacturing coated paper. (6) The matte matte according to claim (1), wherein after applying the aqueous coating composition, near infrared rays having a wavelength of 0.75 to 2.5 μm are used as means for solidifying or drying the wet coating liquid. Method of manufacturing coated paper.